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<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>多个数组求交集</title>
</head>

<body>
  <script>
    function intersection(nums) {
      let a = nums[0]
      for (let i of nums) a = a.filter(_ => i.includes(_))
      return a.sort((a, b) => a - b)
    };
    console.log(intersection([[3, 1, 2, 4, 5], [1, 2, 3, 4], [3, 4, 5, 6]]))
  </script>
</body>

</html>